Bhāgavata-Māhātmya and the Complete Summary of the Śrīmad-Bhāgavatam
गजमुष्टिकचाणूरकंसादीनां तथा वध: । मृतस्यानयनं सूनो: पुन: सान्दीपनेर्गुरो: ॥ ३५ ॥
gaja-muṣṭika-cāṇūra- kaṁsādīnāṁ tathā vadhaḥ mṛtasyānayanaṁ sūnoḥ punaḥ sāndīpaner guroḥ
Also narrated are how Kṛṣṇa and Balarāma killed the elephant Kuvalayāpīḍa, the wrestlers Muṣṭika and Cāṇūra, and Kaṁsa and other demons, as well as how Kṛṣṇa brought back the dead son of His spiritual master, Sāndīpani Muni.
This verse lists Kaṁsa among those slain by Kṛṣṇa, highlighting the Lord’s role in removing oppressive rulers and restoring dharma.
To honor His guru and demonstrate ideal guru-sevā, Kṛṣṇa restored the teacher’s deceased son, showing that devotion and duty to the spiritual master are sacred.
Serve one’s teacher with sincerity, gratitude, and responsibility—valuing guidance and repaying it through disciplined practice and ethical living.